ESR identification of radiation-induced oxygen vacancy centers in paratellurite

A. Watterich, R. H. Bartram, O. R. Gilliam, L. A. Kappers, G. J. Edwards, I. Földvari, R. Voszka

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Abstract

The ESR spectrum of paratellurite (-TeO2) exposed to 1-MeV electron irradiation reveals a single spin-(1/2) defect in eight inequivalent sites with an anisotropic g value close to the free-electron value. Principal g values are 2.01050.0005, 1.9705 0.0005, and 1.9358 0.0005. Resolved hyperfine structure is attributed to magnetic isotopes of tellurium in seven different sites neighboring each defect site. The g-value anisotropy together with the hyperfine structure suggest a positively charged, oxygen-vacancy model (V0(bu) with properties intermediate between those of the E1 center in SiO2 and the F+ center in alkaline-earth oxides.

Original languageEnglish
Pages (from-to)2533-2537
Number of pages5
JournalPhysical Review B
Volume32
Issue number4
DOIs
Publication statusPublished - Jan 1 1985

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ASJC Scopus subject areas

  • Condensed Matter Physics

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